CN110643951A - High-temperature oxidation resistant aluminum-chromium-silicon-nitrogen-aluminum oxide multilayer composite coating and preparation method thereof - Google Patents
High-temperature oxidation resistant aluminum-chromium-silicon-nitrogen-aluminum oxide multilayer composite coating and preparation method thereof Download PDFInfo
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- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
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- C23C14/02—Pretreatment of the material to be coated
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- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/02—Pretreatment of the material to be coated
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- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/0641—Nitrides
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
- C23C14/083—Oxides of refractory metals or yttrium
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
Abstract
The invention discloses an aluminum-chromium-silicon-nitrogen and aluminum oxide multilayer composite coating resistant to high-temperature oxidation, which is prepared from a CrAlTiZrY high-entropy alloy bonding layer, alpha-Cr2O3Oxide template layer, alpha-Al2O3The oxide core layer and the AlCrSiN nitride surface layer are integrated, the four sub-layers are arranged from inside to outside, and the total thickness of the coating is 1-3 mu m. The preparation method comprises the following steps: heating and ion etching the substrate, and depositing a CrAlTiZrY layer on the substrate by using an arc evaporation plating process; then, by using a cathode arc ion plating process,then the alpha-Cr is continuously deposited in turn2O3Layer, alpha-Al2O3A layer and an AlCrSiN layer. Due to the antioxidant synergistic effect of the sub-coatings, the high-temperature oxidation resistance of the aluminum-chromium-silicon-nitrogen-aluminum oxide multilayer composite coating is further improved, the wear resistance of the coating is good, the preparation process is simple, the implementation is easy, and the coating is suitable for industrial production and application.
Description
Technical Field
The invention belongs to the technical field of surface coatings of cutting tools, and particularly relates to an aluminum-chromium-silicon-nitrogen-aluminum oxide multilayer composite coating resistant to high-temperature oxidation and a preparation method thereof.
Background
With the progress of cutting technology and the increase of cutting requirements, cutting tools comprising a surface thereofCoating materials present challenges. The new cutting technology represented by dry chip and high-speed cutting is characterized in that the temperature of a cutting area is increased, and the temperature borne by the cutting part of a cutter is correspondingly increased, so that the coated cutter is frequently subjected to oxidation failure besides surface abrasion failure. The nitride hard coating is a widely used coating material on the surface of a cutting tool, and the nitride coating is easy to react with oxygen in the air under a high-temperature condition, so that the nitride is converted into oxide, the crystal lattice expands, and the nitride is easy to peel off. Thus, the application of nitride hard coatings to dry chip, high speed cutting conditions is challenging. The advantage of an oxide coating is that the coating itself is an oxide, which does not have the problem of oxidation of the coating or which is oxidation resistant, which is more suitable for the operation of the tool at high temperatures. alpha-Al2O3The coating material is an ideal tool surface coating material for cutting processing under high temperature conditions due to compact structure, good chemical stability, good thermal stability and higher hardness and toughness.
The physical vapor deposition method is an important method for preparing the cutter coating material, has low deposition temperature and is suitable for surface coating treatment of various substrate materials. However, the low deposition temperature of the physical vapor deposition method causes the method to deposit alpha-Al2O3Is insufficient in energy, Al produced by physical vapor deposition2O3The coating is usually amorphous or other crystalline structure, and the ideal use effect is difficult to obtain. In addition, Al2O3The hardness of the coating is lower than that of the nitride coating, and the single Al2O3The wear resistance of the coating is insufficient, and a coating system with a complex structure is an important development direction of coatings in the future.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide the high-temperature oxidation resistant aluminum-chromium-silicon-nitrogen-aluminum oxide multilayer composite coating.
The invention also aims to provide a preparation method of the high-temperature oxidation resistant aluminum-chromium-silicon-nitrogen-aluminum oxide multilayer composite coating.
The high-temperature oxidation resistant aluminum-chromium-silicon-nitrogen-aluminum oxide multilayer composite coating is characterized in that the coating is an integral body formed by a high-entropy alloy bonding layer, an oxide template layer, an oxide core layer and a nitride surface layer, the four sublayers are arranged from inside to outside, and the total thickness of the coating is 1-3 mu m.
Wherein, in the coating, the high-entropy alloy bonding layer is CraAlbTicZrdYeThe thickness of the film is 50-200 nm, wherein a + b + c + d + e =1, the ranges of a, b, c, d and e are 0.15-0.4.
Wherein, in the coating, the oxide template layer is alpha-Cr2O3The thickness is 150-300 nm; the oxide core layer is alpha-Al2O3The thickness is 500-2000 nm; the nitride surface layer is AlCrSiN, and the thickness of the nitride surface layer is 300-500 nm.
The preparation method of the high-temperature oxidation resistant aluminum-chromium-silicon-nitrogen-aluminum oxide multilayer composite coating provided by the invention comprises the following steps of:
A. loading the cleaned substrate material into a vacuum chamber of a coating device, vacuumizing and heating;
B. carrying out ion etching on the surface of the substrate;
C. preparing a high-entropy alloy bonding layer by using an arc evaporation process;
D. preparing an oxide template layer by using a cathodic arc coating process;
E. preparing an oxide core layer by using a cathodic arc coating process;
F. and preparing the nitride surface layer by using a cathodic arc coating process.
In the step A, the back bottom is vacuumized to 0.03Pa or below, the auxiliary heating device of the furnace wall is opened to heat the substrate, and the rotating power supply of the frame is turned on to make the substrate rotate and revolve in the vacuum chamber until the temperature of the substrate reaches 380 ℃.
In the step B of the method, argon is introduced into the vacuum chamber, the flow of the argon is adjusted to ensure that the pressure is 0.1-0.25 Pa, and then-100-200V of direct-current bias voltage and-200E C are applied to the substratePulsed bias of-400V with ionized Ar+And etching the surface of the substrate for 30-90 min.
In the step C of the method, the working pressure of the prepared high-entropy alloy bonding by the arc evaporation process is 0.1-0.2 Pa, the arc current passing through the evaporation crucible is 180-220A, and the material placed in the evaporation crucible is CraAlbTicZrdYeThe high-entropy alloy has a + b + c + d + e =1, the value ranges of a, b, c, d and e are 0.15-0.4, and the evaporation time is 5-10 min.
In the step D, the working gas for preparing the oxide template layer by the cathodic arc coating process is Ar + O2The working pressure is 1.5-3.5 Pa, the working target material is a Cr arc target, the target current is 50-100A, the bias voltage applied to the substrate is-30-80V, and the deposition time is 10-20 min.
In the step E, the working gas for preparing the oxide core layer by the cathodic arc coating process is Ar + O2The working pressure is 1.0-3.0 Pa, the working target material is an Al arc target, the target current is 80-120A, the bias voltage applied to the substrate is-30-80V, and the deposition time is 40-150 min.
In the step F, the working gas for preparing the nitride surface layer by the cathodic arc coating process is N2The working pressure is 1.5-3.5 Pa, the working target material is an AlCrSi alloy arc target, the target current is 80-120A, the bias voltage applied to the substrate is-30 to-80V, and the deposition time is 20-35 min.
Compared with the prior art, the invention has the following advantages:
1) the high-temperature oxidation resistant aluminum-chromium-silicon-nitrogen and aluminum oxide multilayer composite coating provided by the invention is composed of four sublayers with different functions and components, and firstly, compared with the traditional Cr and Ti pure metal bonding layer and TiAl alloy bonding layer, the high-entropy alloy bonding layer has higher toughness, can play a good bonding role between a cutter substrate material and a surface coating material, and enables the coating and the substrate to be firmly combined; next, alpha-Cr is used2O3The oxide template layer is beneficial to Al2O3According to alpha-Cr2O3The crystal structure epitaxial growth solves the problem of preparing alpha-Al by a physical vapor deposition method due to low temperature2O3The problem of difficulty; thirdly, alpha-Al2O3The oxide core layer is combined with the AlCrSiN nitride surface layer, so that the problems of low hardness and insufficient wear resistance of a pure oxide coating and low high-temperature oxidation resistance of the pure nitride coating are solved.
2) The invention provides a preparation method of an aluminum-chromium-silicon-nitrogen and aluminum oxide multilayer composite coating resistant to high-temperature oxidation, which is a combined type ion plating process mainly based on cathodic arc deposition and assisted by preparing a bonding layer through an evaporation plating process. Before coating, impurities adsorbed in the substrate material are released by heating, and meanwhile, the surface of the substrate is bombarded and etched by ionized Ar +, so that the combination of the coating and the substrate is enhanced; the high-entropy alloy material is evaporated by adopting an electric arc evaporation process, a high-entropy alloy bonding layer is deposited on the substrate, the bonding capacity of the coating and the substrate is further enhanced, the bonding layer is prepared by electric arc evaporation, the advantages of high deposition rate and almost unlimited size and shape of the evaporation raw material are that the evaporation raw material is weighed and then put into an evaporation crucible, and the bonding layer is deposited by adopting cathode electric arc ion plating, so that the evaporation raw material is required to be prepared into a target material with a certain shape and size; high ionization rate of particles and high ion energy in the process of cathode arc ion plating, and alpha-Al is easier to obtain than magnetron sputtering2O3. In the process of depositing the coating, the preparation of the multilayer composite coating is easy by switching different arc targets, and the operation process is simple and easy to master and control.
Detailed Description
The present invention is further illustrated by the following specific examples, but the present invention is not limited to the following examples.
Example 1
Loading a clean metal ceramic substrate into a vacuum chamber of a plasma enhanced composite ion plating system, opening an auxiliary heating device of a furnace wall to heat the substrate when the back of the substrate is vacuumized to 0.02Pa, simultaneously opening a rotating power supply to enable the substrate to rotate ceaselessly, and heating until the temperature of the substrate reaches the temperature of the substrateTo 380 ℃; introducing argon into the vacuum chamber, adjusting the flow of argon to ensure that the pressure is 0.1Pa, applying-200V DC bias and-400V pulse bias to the substrate, and utilizing ionized Ar+Etching the surface of the substrate for 60 min; closing substrate bias voltage and adjusting argon flow in sequence to ensure that working pressure is 0.15Pa, starting an evaporation plating main arc power supply to carry out evaporation coating, wherein the main arc current on a crucible is 180A, and evaporation raw material is Cr0.2Al0.2Ti0.2Zr0.2Y0.2Blocking, evaporating and depositing for 10 min; closing a main arc power supply, starting a Cr arc target, setting the target current to be 70A, introducing oxygen into the vacuum chamber, adjusting the flow of argon and oxygen to enable the working pressure to be 2.5Pa, applying bias voltage of-50V to the substrate, and depositing for 12 min; starting an Al arc target, setting the target current to be 80A, then closing a Cr arc target power supply, keeping the working pressure and the substrate bias voltage unchanged, and continuing to deposit for 120 min; starting the AlCrSi alloy arc target, setting the target current to be 100A, then closing the power supply of the Al arc target, introducing nitrogen, closing oxygen and argon, adjusting the gas flow, controlling the working pressure to be 2.0Pa, continuously keeping the substrate bias voltage unchanged, and ending the deposition for 30 min. The prepared high-temperature oxidation resistant aluminum-chromium-silicon-nitrogen and aluminum oxide multilayer composite coating consists of a CrAlTiZrY high-entropy alloy bonding layer and alpha-Cr2O3Oxide template layer, alpha-Al2O3The oxide core layer and the AlCrSiN nitride surface layer consist of four sub-layers, the sub-layers and the coating layer are well combined with the substrate, and the oxidation resistance is good under the high-temperature condition.
Example 2
Putting a clean hard alloy substrate into a vacuum chamber of a plasma enhanced composite ion coating system, opening an auxiliary heating device of a furnace wall to heat the substrate when the back substrate is vacuumized to 0.03Pa, and simultaneously opening a rotating power supply to enable the substrate to rotate ceaselessly until the temperature of the substrate reaches 380 ℃; introducing argon into the vacuum chamber, adjusting the flow of argon to ensure that the pressure is 0.25Pa, applying-200V DC bias and-350V pulse bias to the substrate, and utilizing ionized Ar+Etching the surface of the substrate for 30 min; sequentially closing substrate bias voltage, regulating argon flow and protectingThe working pressure is proved to be 0.2Pa, the evaporation coating main arc power supply is started to carry out evaporation coating, the main arc current on the crucible is 210A, and the evaporation raw material is Cr0.2Al0.2Ti0.2Zr0.2Y0.2Blocking, evaporating and depositing for 6 min; closing a main arc power supply, starting a Cr arc target, setting the target current to be 80A, introducing oxygen into the vacuum chamber, adjusting the flow of argon and oxygen to enable the working pressure to be 3.0Pa, applying a bias voltage of-80V to the substrate, and depositing for 15 min; starting an Al arc target, setting the target current to be 90A, then closing a Cr arc target power supply, adjusting the gas flow, controlling the pressure to be 2.5Pa, and keeping the substrate bias constant to continue depositing for 150 min; and starting the AlCrSi alloy arc target, setting the target current as 120A, then closing an Al arc target power supply, introducing nitrogen, closing oxygen and argon, adjusting the gas flow, controlling the working pressure to be 2.6Pa, continuously keeping the substrate bias voltage unchanged, and finishing the deposition for 20 min. The prepared high-temperature oxidation resistant aluminum-chromium-silicon-nitrogen and aluminum oxide multilayer composite coating consists of a CrAlTiZrY high-entropy alloy bonding layer and alpha-Cr2O3Oxide template layer, alpha-Al2O3The oxide core layer and the AlCrSiN nitride surface layer consist of four sub-layers, the sub-layers and the coating layer are well combined with the substrate, and the oxidation resistance is good under the high-temperature condition.
Example 3
Loading a clean metal ceramic substrate into a vacuum chamber of a plasma enhanced composite ion coating system, opening an auxiliary heating device of a furnace wall to heat the substrate when the back substrate is vacuumized to 0.03Pa, and simultaneously opening a rotating power supply to enable the substrate to rotate ceaselessly until the temperature of the substrate reaches 380 ℃; introducing argon into the vacuum chamber, adjusting the flow of argon to ensure that the pressure is 0.15Pa, applying-200V DC bias and-400V pulse bias to the substrate, and utilizing ionized Ar+Etching the surface of the substrate for 90 min; closing substrate bias voltage and adjusting argon flow in sequence to ensure that working pressure is 0.1Pa, starting an evaporation plating main arc power supply to carry out evaporation coating, wherein the main arc current on a crucible is 220A, and evaporation raw material is Cr0.2Al0.2Ti0.2Zr0.2Y0.2Blocking, evaporating and depositing for 5 min; turning off the main arc power supply and turning on Cr, setting the target current as 100A, introducing oxygen into the vacuum chamber, adjusting the flow of argon and oxygen to make the working pressure be 3.5Pa, applying bias voltage of-30V to the substrate, and depositing for 10 min; opening an Al arc target, setting the target current to be 120A, then closing a Cr arc target power supply, adjusting the gas flow, controlling the pressure to be 3.0Pa, adjusting the substrate bias voltage to be-40V, and coating for 70 min; starting the AlCrSi alloy arc target, setting the target current as 100A, then closing the Al arc target power supply, introducing nitrogen, closing oxygen and argon, adjusting the gas flow, controlling the working pressure to be 2.8Pa, adjusting the substrate bias voltage to be-50V, and finishing the deposition for 30 min. The prepared high-temperature oxidation resistant aluminum-chromium-silicon-nitrogen and aluminum oxide multilayer composite coating consists of a CrAlTiZrY high-entropy alloy bonding layer and alpha-Cr2O3Oxide template layer, alpha-Al2O3The oxide core layer and the AlCrSiN nitride surface layer consist of four sub-layers, the sub-layers and the coating layer are well combined with the substrate, and the oxidation resistance is good under the high-temperature condition.
Example 4
Putting a clean hard alloy substrate into a vacuum chamber of a plasma enhanced composite ion coating system, opening an auxiliary heating device of a furnace wall to heat the substrate when the back substrate is vacuumized to 0.03Pa, and simultaneously opening a rotating power supply to enable the substrate to rotate ceaselessly until the temperature of the substrate reaches 380 ℃; introducing argon into the vacuum chamber, adjusting the flow of argon to ensure that the pressure is 0.18Pa, applying-200V DC bias and-400V pulse bias to the substrate, and utilizing ionized Ar+Etching the surface of the substrate for 45 min; closing substrate bias voltage and adjusting argon flow in sequence to ensure that working pressure is 0.18Pa, starting an evaporation plating main arc power supply to carry out evaporation coating, wherein the main arc current on a crucible is 200A, and evaporation raw material is Cr0.4Al0.15Ti0.15Zr0.15Y0.15Blocking, evaporating and depositing for 10 min; closing a main arc power supply, starting a Cr arc target, setting the target current to be 70A, introducing oxygen into the vacuum chamber, adjusting the flow of argon and oxygen to enable the working pressure to be 1.5Pa, applying bias voltage of-80V to the substrate, and depositing for 15 min; starting Al arc target, setting target current at 120A, then closing Cr arc target power supply, and regulating gas flowControlling the pressure to be 3.0Pa, keeping the substrate bias constant, and continuously plating the film for 40 min; starting the AlCrSi alloy arc target, setting the target current to be 80A, then closing the power supply of the Al arc target, introducing nitrogen, closing oxygen and argon, adjusting the gas flow, controlling the working pressure to be 1.5Pa, continuously keeping the substrate bias voltage unchanged, and finishing the deposition for 20 min. The prepared high-temperature oxidation resistant aluminum-chromium-silicon-nitrogen and aluminum oxide multilayer composite coating consists of a CrAlTiZrY high-entropy alloy bonding layer and alpha-Cr2O3Oxide template layer, alpha-Al2O3The oxide core layer and the AlCrSiN nitride surface layer consist of four sub-layers, the sub-layers and the coating layer are well combined with the substrate, and the oxidation resistance is good under the high-temperature condition.
Claims (10)
1. The high-temperature oxidation resistant aluminum-chromium-silicon-nitrogen-aluminum oxide multilayer composite coating is characterized in that the coating is an integral body formed by a high-entropy alloy bonding layer, an oxide template layer, an oxide core layer and a nitride surface layer, the four sublayers are arranged from inside to outside, and the total thickness of the coating is 1-3 mu m.
2. The multilayer composite coating of aluminum-chromium-silicon-nitrogen-aluminum oxide with high temperature oxidation resistance as claimed in claim 1, wherein the high-entropy alloy bonding layer is CraAlbTicZrdYeThe thickness of the film is 50-200 nm, wherein a + b + c + d + e =1, the ranges of a, b, c, d and e are 0.15-0.4.
3. The multilayer composite coating of aluminum-chromium-silicon-nitrogen-and-aluminum oxide with high temperature oxidation resistance as claimed in claim 1, wherein the oxide template layer is α -Cr2O3The thickness is 150-300 nm; the oxide core layer is alpha-Al2O3The thickness is 500-2000 nm; the nitride surface layer is AlCrSiN, and the thickness of the nitride surface layer is 300-500 nm.
4. The preparation method of the high temperature oxidation resistant aluminum-chromium-silicon-nitrogen-aluminum oxide multilayer composite coating according to any one of claims 1 to 3, characterized by comprising the following steps:
A. loading the cleaned substrate material into a vacuum chamber of a coating device, vacuumizing and heating;
B. carrying out ion etching on the surface of the substrate;
C. preparing a high-entropy alloy bonding layer by using an arc evaporation process;
D. preparing an oxide template layer by using a cathodic arc coating process;
E. preparing an oxide core layer by using a cathodic arc coating process;
F. and preparing the nitride surface layer by using a cathodic arc coating process.
5. The method for preparing the multilayer composite coating of aluminum, chromium, silicon, nitrogen and aluminum oxide with high temperature oxidation resistance as claimed in claim 4, wherein in the step A, the evacuation and heating are carried out by evacuating the back substrate to 0.03Pa or below, opening the auxiliary heating device on the furnace wall to heat the substrate, and simultaneously turning on the frame to rotate and revolve the substrate in the vacuum chamber until the temperature of the substrate reaches 380 ℃.
6. The method for preparing the multilayer composite coating of aluminum, chromium, silicon, nitrogen and aluminum oxide with high temperature oxidation resistance as claimed in claim 4, wherein in the step B, the ion etching is performed by introducing argon gas into the vacuum chamber, adjusting the flow of the argon gas to ensure that the pressure is 0.1-0.25 Pa, then applying a DC bias of-100-200V and a pulse bias of-200-400V to the substrate, and utilizing the ionized Ar+And etching the surface of the substrate for 30-90 min.
7. The method for preparing the multilayer composite coating of Al-Cr-Si-N and Al-oxide with high temperature oxidation resistance as claimed in claim 4, wherein in step C, the working pressure of the high-entropy alloy bonding prepared by the arc evaporation process is 0.1-0.2 Pa, the arc current passing through the evaporation crucible is 180-220A, and the material placed in the evaporation crucible is CraAlbTicZrdYeHigh entropy alloy, a + b + c+ d + e =1, the value ranges of a, b, c, d and e are 0.15-0.4, and the evaporation time is 5-10 min.
8. The method for preparing the multilayer composite coating of Al-Cr-Si-N and Al-oxide with high temperature oxidation resistance as claimed in claim 4, wherein in step D, the working gas for preparing the oxide template layer by the cathodic arc plating process is Ar + O2The working pressure is 1.5-3.5 Pa, the working target material is a Cr arc target, the target current is 50-100A, the bias voltage applied to the substrate is-30-80V, and the deposition time is 10-20 min.
9. The method for preparing the multilayer composite coating of Al-Cr-Si-N and Al-oxide with high temperature oxidation resistance as claimed in claim 4, wherein in step E, the working gas for preparing the oxide core layer by the cathodic arc plating process is Ar + O2The working pressure is 1.0-3.0 Pa, the working target material is an Al arc target, the target current is 80-120A, the bias voltage applied to the substrate is-30-80V, and the deposition time is 40-150 min.
10. The method for preparing the multilayer composite coating of Al-Cr-Si-N and Al-oxide with high temperature oxidation resistance according to claim 4, wherein in step F, the working gas for preparing the nitride surface layer by the cathodic arc plating process is N2The working pressure is 1.5-3.5 Pa, the working target material is an AlTi alloy arc target, the target current is 80-120A, the bias voltage applied to the substrate is-30-80V, and the deposition time is 20-35 min.
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